Combustion-promoting device



Sept. 18 i923, lf@

T. F. LAWTER ET AL A COMBUSTION PROMOTING DEVICE Filed Sept. v(5. 1922WITNESS:

ATTO RN EY Parenteel sept. is, 1923.

tirent l. .i l i I i THOMAS F. LAWTER AND ALVA H. LAVVTER, OF NEWCASTLE,INDIANA.

COMBUSTION-PROMGTING DEVICE.

Application led September G, 1922. Serial No. 586.466.

T all lwho/ml t may concer/IL.'

Be it known that we, THOMAS F. LAW- TER and Anm H. LAw'rnn, citizens ofthe United States, residing at Newcastle,'in the county of Henry andState of Indiana, have invented new and useful Improvements inCombuStien-Promoting Devices, of which the following is a specification.

Our present invention has reference to a heating plant.

Our object is to provide in a stove or furnace a means for admitting airinto the fire box thereof, causing such air to be heated and the heatedair delivered downwardly on to `the burning coals to mix with the gasestherefrom, and thereby greatly promoting combustion, and consequentlyobtain a greater heat with a smaller consumption of fuel.

rEhe foregoing, and other objects which will present themselves as thenature of the invention is better understood, may be accomplished by aconstruction, combination and operative association of parts, such as isdisclosed by the drawings which accompany and which form part of thisspecification. Y

In the drawings Figure 1 is an approximately central verticallongitudinal sectional view through a heating plant, such as an ordinaryfurnace, provided with the impro-vement.

Figure 2 is a sectional view on the line 2 2 of 'Figure l.

Referring new to the drawings in detail, the numeral l designates aheatingfplant, such as an ordinary furnace. ln the furnace, andextending centrally from but secured a slight andV suitable distanceabove the grate 2 there is a drum 3. The drum is gradually flaredinwardly from its lower open end to its top, the open end of the saiddrum being so positioned that air from the ash pit will enter lthe drum.The open end of the druni may be provided with outwardly directedears'flwhich are secured in any desired. manner in the furnace forsupporting the same. The drum 3,l at its reduced upper end is providedwith a tubular extension 5, and on this extension there is formed ahollow head 6. The head 6 `is the nature of an air mixer and the wallsconstituting the same are concave-convex 1n cross section, the upper andlower walls being connected by a rounded wall or edge 7,

andthe said wall or edge is provided with spaced apertures 8 wherebyheated air from the mir-ing chamb r or head 6 will be delivereddownwardly on to the burning coals.

Connected to the drum preferably at the juncture of the pipe or tubularextension 5 with the conical end thereof, there is a cold air inlet pipel0, the said pipe extending through one of the sides of the furnace andif desired, this pipe may communicate with the outer atmospheric air.

lt is thought that the foregoing description, when taken in connectionwith the drawings will fully set forth the construction, operation andadvantages of the improvement to those skilled in the art to Vwhich suchinventions relate, it being apparent that the live coals willeffectively heat the drum and the elements associated therewith, thatcool air will enter the drum through the pipe l0, that the said air willcirculate through the pipe extension 5 into the mixing chamber 6 andwill be from thence delivered through the restricted apertures in thehead or mixing chamber downwardly on to the live coals, therebymaterially increasing combustion and also thereby obtaining a greateramount of heat from a less consumption of fuel.

Having described the invention, we claim:

The combination with a heating device, of a flared drum having itswidened end open and arranged above the grate of the heating device,said drum having at its restricted end a tubular extension whichterminates in a hollow head, the opposed walls of the head beingroundedV from the center thereof downwardly and being connected by arounded edge which is apertured on the under face thereof and a cold airconducting pipe extending through the heating device .and connected totheV tubular extension.

InV testimony whereof we our signatures.

THOMAS F. LAWTER. ALVA H. LAVTER.

